From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933398AbbLTLpv (ORCPT ); Sun, 20 Dec 2015 06:45:51 -0500 Received: from terminus.zytor.com ([198.137.202.10]:48679 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932274AbbLTLpu (ORCPT ); Sun, 20 Dec 2015 06:45:50 -0500 Date: Sun, 20 Dec 2015 03:45:35 -0800 From: tip-bot for Jake Oshins Message-ID: Cc: hpa@zytor.com, mingo@kernel.org, jakeo@microsoft.com, linux-kernel@vger.kernel.org, tglx@linutronix.de Reply-To: tglx@linutronix.de, mingo@kernel.org, hpa@zytor.com, jakeo@microsoft.com, linux-kernel@vger.kernel.org In-Reply-To: <1449769983-12948-4-git-send-email-jakeo@microsoft.com> References: <1449769983-12948-4-git-send-email-jakeo@microsoft.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:x86/apic] x86/irq: Export functions to allow MSI domains in modules Git-Commit-ID: c8f3e518d3444ee9200a4987421fcee60f768f11 X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: c8f3e518d3444ee9200a4987421fcee60f768f11 Gitweb: http://git.kernel.org/tip/c8f3e518d3444ee9200a4987421fcee60f768f11 Author: Jake Oshins AuthorDate: Thu, 10 Dec 2015 17:52:59 +0000 Committer: Thomas Gleixner CommitDate: Sun, 20 Dec 2015 12:40:49 +0100 x86/irq: Export functions to allow MSI domains in modules The Linux kernel already has the concept of IRQ domain, wherein a component can expose a set of IRQs which are managed by a particular interrupt controller chip or other subsystem. The PCI driver exposes the notion of an IRQ domain for Message-Signaled Interrupts (MSI) from PCI Express devices. This patch exposes the functions which are necessary for creating a MSI IRQ domain within a module. [ tglx: Split it into x86 and core irq parts ] Signed-off-by: Jake Oshins Cc: gregkh@linuxfoundation.org Cc: kys@microsoft.com Cc: devel@linuxdriverproject.org Cc: olaf@aepfle.de Cc: apw@canonical.com Cc: vkuznets@redhat.com Cc: haiyangz@microsoft.com Cc: marc.zyngier@arm.com Cc: bhelgaas@google.com Link: http://lkml.kernel.org/r/1449769983-12948-4-git-send-email-jakeo@microsoft.com Signed-off-by: Thomas Gleixner --- arch/x86/include/asm/msi.h | 6 ++++++ arch/x86/kernel/apic/msi.c | 8 +++++--- arch/x86/kernel/apic/vector.c | 2 ++ 3 files changed, 13 insertions(+), 3 deletions(-) diff --git a/arch/x86/include/asm/msi.h b/arch/x86/include/asm/msi.h index 93724cc..eb4b09b 100644 --- a/arch/x86/include/asm/msi.h +++ b/arch/x86/include/asm/msi.h @@ -1,7 +1,13 @@ #ifndef _ASM_X86_MSI_H #define _ASM_X86_MSI_H #include +#include typedef struct irq_alloc_info msi_alloc_info_t; +int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec, + msi_alloc_info_t *arg); + +void pci_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc); + #endif /* _ASM_X86_MSI_H */ diff --git a/arch/x86/kernel/apic/msi.c b/arch/x86/kernel/apic/msi.c index 5f1feb6..ade2532 100644 --- a/arch/x86/kernel/apic/msi.c +++ b/arch/x86/kernel/apic/msi.c @@ -96,8 +96,8 @@ static irq_hw_number_t pci_msi_get_hwirq(struct msi_domain_info *info, return arg->msi_hwirq; } -static int pci_msi_prepare(struct irq_domain *domain, struct device *dev, - int nvec, msi_alloc_info_t *arg) +int pci_msi_prepare(struct irq_domain *domain, struct device *dev, int nvec, + msi_alloc_info_t *arg) { struct pci_dev *pdev = to_pci_dev(dev); struct msi_desc *desc = first_pci_msi_entry(pdev); @@ -113,11 +113,13 @@ static int pci_msi_prepare(struct irq_domain *domain, struct device *dev, return 0; } +EXPORT_SYMBOL_GPL(pci_msi_prepare); -static void pci_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc) +void pci_msi_set_desc(msi_alloc_info_t *arg, struct msi_desc *desc) { arg->msi_hwirq = pci_msi_domain_calc_hwirq(arg->msi_dev, desc); } +EXPORT_SYMBOL_GPL(pci_msi_set_desc); static struct msi_domain_ops pci_msi_domain_ops = { .get_hwirq = pci_msi_get_hwirq, diff --git a/arch/x86/kernel/apic/vector.c b/arch/x86/kernel/apic/vector.c index 861bc59..908cb37 100644 --- a/arch/x86/kernel/apic/vector.c +++ b/arch/x86/kernel/apic/vector.c @@ -29,6 +29,7 @@ struct apic_chip_data { }; struct irq_domain *x86_vector_domain; +EXPORT_SYMBOL_GPL(x86_vector_domain); static DEFINE_RAW_SPINLOCK(vector_lock); static cpumask_var_t vector_cpumask; static struct irq_chip lapic_controller; @@ -66,6 +67,7 @@ struct irq_cfg *irqd_cfg(struct irq_data *irq_data) return data ? &data->cfg : NULL; } +EXPORT_SYMBOL_GPL(irqd_cfg); struct irq_cfg *irq_cfg(unsigned int irq) {